Yes, sorry about the delay. I also did a not-so scientific study on blade longevity and found the P-S was in the tops as far as getting good shaves for an extended period of usage. I actually got to 10 shaves on the P-S, with different razors. By that time it took me 3 passes and buffing but still comfortable with very little alum sting. I think I'll be going with approx 8 shaves per blade with this brand. Feathers rarely if ever, get past 4 shaves before tugging, weepers and noticeable alum sting.